complete newbie to OpenGL
recommend where one can learn it from scratch?
I have the impression of only scratching on the surface all the time.
Unfortunately you are asking for contradictory things.
A beginner book needs to educate you on the beginner topics. This means teaching you the basics of the pipeline, the basics of what a model is, what a texture is. The basics of what is involved in manipulating models, how to work with transformations, and how to work with the fundamentals.
This is what you NEED in a beginner book. A good beginner book will walk you through the beginning steps, and if you apply yourself to your studies, you might graduate from the book as an advanced beginner or intermediate skill level.
A good beginner book absolutely should only scratch the surface. Most of the high performance graphics techniques are complex and nuanced --- the opposite of what you want in a beginner book. You can start out with a beginner book, and that is a good thing. Beginners start at a beginning level. Then they move to an intermediate level, and on to an advanced level, and finally grow to become experts.
When you were learning to read you probably started with the equivalent of "See Spot Run" beginning books, eventually moving on to chapter books, and only after years of practice did you evolve to complex reading material. When you were learning mathematics you started with addition and subtraction, moved on to multiplication and division and fractions, slowly growing and learning trig and algebra and other skills. You don't start a beginner with expert material.
Glancing over at my shelf right now, I see copies of the beginner books (the Red Book, The OpenGL SuperBible) but also about ten other books like GPU Gems series, Graphics Gems series, and also three 3" binders full of advanced printed material.
If you choose this as your field it will not be your only book. Do your best to master the content in the book, and then move on to more advanced material. Eventually you will be able to grow to advanced-level and expert-level techniques, but right now recognize you are still a beginner. And that is okay.